The policy of GE Industrial Systems is one of continuous improvement. The right is reserved to alter the design on any structural details of the products at any time without giving notice.
Squirrel-Cage Motor Starting Types and Ratings IEC Ratings. Recommended Motor and Type Unit Ratings NEMA Ratings. Thermal Characteristics Technical Specifications General Specifications LCD Arrangement Status LEDs Mode Pages Terminal 7 and 8 Programming.
Statistical Data — page 9. Non Adjustable Protection and Fault Reset. Occurrence Table. Prior to Installation Forced Ventilation Set: Generator Parameters Internal Fan Control Remote Key-Pad Installation Starting Procedure Standard Starting Procedure Light Loads - Pumps, Etc.
Starting Curve Stopping Curve Trouble Shooting Application diagrams Terminal 21 Connections With Various Mains Soft Start and Soft Stop External Fault Line Contactor Bypass Contactor Set: Generator Parameters Wiring Short Circuit Protection Transient Protection Inside Delta Configuration Basic Structure of the Serial Link Frame Serial Link No. Slave Address Parameter Settings 4X References Control Register Write 4X Reference Discrete Commands Coils, 0x References Discrete Hardwired Inputs 1x References Exception Responses Appendix B - Profibus Watch Dog Definition Actual Data Register Numbers decimal Setting Parameters Registers for Data Request Reference Documents Rotary Switch Configuration LED Indicators Class Attributes Instance Instance Attributes Instance Common Services Output Instance 0x70 — Control Output Input T20 Instance Attributes — Register Input Instance 0x64 — Status Extended AtReference Values Extended StartMode Values There are numerous applications where soft starting and limited current peak are needed, thereby making direct starting of squirrel-cage motors impossible.
Traditionally in such cases other types of starting with reduced stator voltage have been resorted to. The best-known are star-delta starters, autotransformer starters, stator resistance starters or using part winding motors. Any reduced starting voltage imposes a current limitation, thus reducing the starting torque, but there will always be peaks during the change from one point or state to another which can damage the machine being driven.
Note that in general, all reduced voltage starts reduce torque in squared proportion to the current in the phases of the motor not on the line and the latter in turn is reduced in linear proportion to the voltage. From this it can be deduced that any start with reduced voltage reduces the torque in squared proportion to the voltage per motor.
From this point of view soft starting produces just like any other reduced voltage start, a reduction in starting torque, according to the adjusted parameters.
The advantage is the ease with which this ramp can be controlled to produce a soft start in accordance with the actual requirement of the machine. Starting and stopping the motor without steps or transitions lengthens the life of power-driven machine mechanical elements, greatly reducing stress on transmission and coupling parts.
Consequently, overhauling times are reduced and machine and facility lifespans are lengthened. Being able to start by using the voltage ramp or alternatively by limiting current lets acceleration fit the load characteristics. Application of a pulse start may also be selected in cases of high static friction load. The soft starter protects the motor from overloads as well as from incorrect operating conditions such as loss of an input or output phase, blocked rotor, thyristor short circuit, etc.
The control system is based on the use of a highly specialized microcontroller by which signals are treated digitally, thereby avoiding deratings and adjustments common to analogue circuits and obtaining excellent precision and speed of execution.
The control board is made with the technology of surface mounting devices SMD , which increases equipment reliability. Adjustments are very easy to make and diverse options maybe selected for have equipment capabilities suited to application needs every time. The alphanumeric display and the LEDs on its front overlay makes the equipment working conditions known at any time.
The ASTAT-XT includes several soft stop curves which is more effective than the standard soft stop, reducing fluid surges or hammering in a pipe line system. This method reduces the motor speed, by controlling internal parameters in the motor as well as the output voltage in a close-loop system.
These functions allow the incorporation of the soft starter to a distributed control net, in automated plant processes, together with other soft starters, programmable controllers, variable speed drives, etc.
Design of the unit was closely tied to the conditions of supply lines, which handle more disturbances every day. The control signals are opto-electronically isolated and various levels of protection have been set up in the circuits to immunize the equipment against external disturbance and its effects. Recommended Motor and Type Unit Ratings. Use QT1xxxx units for power supply and motors rated at VV. In addition, these curves may be used for torque control starting of constant. A single current control starting curve.
It appears when Starting. Voltage is displayed, the up arrow is pressed and Starting Voltage has. Maximum allowable starting time sec. Trips when main voltage drops below V, time delay Sec. Optional Auto. Trips if operating at slow speed TRQ for more than sec sec 9. Set: Generator Parameters. Refer to section 4. When the At Fault Close function is selected, the relay. When the At Fault Open function is selected, the relay is. The contact returns to its original position when Energy.
Save is operated, on Soft Stop or Stop signals, on Fault. When a mains neutral wire is available, connect terminal Adjustable via Starting Voltage parameter. Adjustable via Ramp UP Time. Secondary ramp sec. Adjustable via Ramp UP-2 parameter.
Fast ramp if the motor is up to speed before the end of normal ramp time Nominal voltage. Deceleration ramp sec. Two lines of 16 alphanumeric characters each with selectable languages — English, Italian, German, and Spanish. When a mode name is displayed, pressing this button drills down to the parameters for that mode. When a parameter is displayed, pressing this button scrolls to the next parameter. Allows the operator to increment adjusted values shown in the display.
Operator should press this. Allows the operator to decrement adjusted values shown in the display. Stores modified parameters only when you have scrolled through all parameters and Store. Set Settings Xxxxxx Parameters is displayed. After you store a parameter successfully Data Saved OK will display. Lights after completion of the starting process, indicating that motor is receiving.
Lights during soft stop, indicating that the motor supply voltage is ramping down. To store the new parameters, press the Select key until the Store Settings Xxxxxx Parameters message displays and then press the Set key.
The Data Saved OK message will display for 2 seconds. The LCD will display:. Obtaining Default Data erases all previously modified settings and requires the operator to reprogram all parameters that differ from the factory default.
Protocol parameters. Each group of COMM. Protocol parameters are only valid when its corresponding optional PCB is installed. Refer to section 5. Factory preset - features and functions not active when. Enabled will set the overload protection to be operative at. When Overload Protect is set to Disabled the motor.
Can not be set lower than the Undervoltage FLT. To store selected parameters scroll through all parameters until you reach Store Settings Main Settings , then press the Set key. After you store a parameter successfully the Data Saved OK message will display. Kickstart Time is adjustable, 0. After this pulse the voltage is ramped down to Starting Voltage setting before ramping up again to full voltage according to the Start.
Voltage setting overrides the Current Limit setting. When Starting Voltage is set its maximum value, this displays changes to Starting Current. It is recommended to set the Ramp UP Time to the minimum acceptable value approx. When the motor reaches full speed before voltage reaches nominal, Ramp UP Time setting is overridden, causing voltage to quickly ramp-up to nominal. Using Soft Start Curve 1, 2, 3 prevents quick ramp up.
For example, this can occur when the Current Limit setting. Limits the Number of Starts during the period of time. Same as Store Settings Main Settings on page Soft Start Curve 0 — Standard curve Default. This curve is the most suitable curve for preventing prolonged starting and motor overheating. Soft Start Curves - Pump Control - Induction motors produce peak torque of up to 3 times the rated torque towards the end of starting process.
In some pump applications, this peak may cause a pressure surge in the pipes. Soft Start Curves 1, 2, 3 — During acceleration before reaching peak torque, the Pump Control Program automatically controls the voltage ramp-up, thus, reducing peak torque. Soft Start Curve 4 Torque — Torque Controlled acceleration - This provides a smooth time-controlled torque ramp for the motor and the pump.
Always start with Soft Start Curve 0. If towards the end of ramp, peak torque is too high pressure is too high proceed to Soft Start Curve 1, 2, 3 or 4 in that order. Same as Store Settings Main Settings on.
The most stable and suitable curve for preventing prolonged stopping and motor overheating. Soft Stop Curves 1, 2, 3 Pump Control — In some pump applications, when pumping to higher elevation a considerable part of the torque is constant and does not decrease with speed. It may happen that during the deceleration process when voltage decreases the motor torque abruptly falls below load torque instead of smoothly decreasing speed to zero , thus closing the valve and causing water hammer.
Soft Stop Curves 1, 2 and 3 eliminate the water hammer phenomenon. In pump applications the load torque decreases in square relation to the speed, thus correcting control of voltage to reduce torque adequately and to smooth deceleration to a stop. It is recommended that Soft Stop Curve 0 be used for all standard applications not pumps.
To reduce water hammer, select Soft Stop Curve 1 , then 2 , then 3 in that order. In certain loads, linear torque deceleration can result in close to linear speed deceleration, thus eliminating stall conditions.
Always use Soft Stop Curve 0. If the motor stalls quickly instead of slowly decreasing its speed, select Soft Stop Curve 1, 2, 3 or 4 in that order until the problem is solved. When D. Set: Generator Parameters is required, do the following:. Program PROG. Set dip switch 3 to ON refer to section 5. Connect control inputs voltage to input terminal 8. The following display appears:.
Input 7 to Energy Saving refer to. When using Energy Saving function, harmonics should be. Welcome to ManualMachine.
We have sent a verification link to to complete your registration. Log In Sign Up. The right is reserved to alter the design on any structural details of the products at any time without giving notice. Disconnect power before installing or servicing. Hazardous voltages are present in the motor circuit even when the starter is OFF.
An isolation contactor, configured to provide automatic isolation when the motor is turned OFF is recommended. Unit may contain more than one live circuit. Disconnect both control and main circuits before installing or servicing. Soft stop should not be used as an Emergency stop. Stopping mode must be set to meet applicable standards for operator safety. Separate motor overcurrent protection is required to be provided in accordance with the Canadian Electrical Code, Part 1.
Semi-conductor fuses specified may not provide branch circuit protection. Refer to local applicable electrical codes. Overload relay setting should be properly coordinated with motor. Contact motor manufacturer to ensure proper motor selection has been made for these conditions. If control power is lost between starts, the overload relay protection is reset to cold start conditions.
L'appareil peut renfermer plus d'un circuit sous tension de'brancher les circuits principaux et les circuits de controle avant de raccorder ou d'intervenir. Section 1. Features and benefits Types and Ratings Thermal characteristics Technical Specifications General specifications Operating modes Section 4.
Parameter block configuration Monitor block parameters Calibration block parameters Basic block parameters Advanced block parameters Equipment installation Branch circuit protection Thyristor check Application diagrams Serial communications There are numerous applications where soft starting and limited current peaks are needed for the starting of squirrel cage induction motors.
Traditionally, reduced voltage starting was accomplished using electromechanical starters, such as star delta starters, autotransformer starters, stator resistance starters or by using part-winding motors. These methods would provide a two-, threeor four-step torque change by switching the motor voltage from reduced value to full voltage in steps after a preset time interval.
The same solid state devices may also be used to reduce the voltage for the deceleration of the motor should this be required in the application. This starting and stopping method provides smooth, stepless acceleration and deceleration of AC squirrel-cage induction motors. When the motor reaches the end of the ramp, a bypass contactor is energized and the SCRs are switched off. Typical applications include the following:. An increase in productivity and reliability with the use of static soft starters.
Starting with the voltage ramp or, alternatively, by starting current limitation, the acceleration and deceleration ramp more closely fits load characteristics. A kick start may also be selected in instances of high static friction load. The ASTAT-IBP Plus protects the motor from overloads as well as from incorrect operating conditions, such as loss of an input or output phase, stalled rotor, thyristor short circuit, etc. The control system is based on the use of a highly specialized microcontroller that treats the signals digitally, thereby avoiding deratings and adjustments common to analog circuits.
This type of control ensures excellent precision and speed of execution. The control board is designed using surface mounted devices SMD to increases equipment reliability. The control signals are optoelectronically isolated. Various levels of protection have been set up in the circuits to immunize the equipment against external disturbance and their harmful effects.
A keypad and a digital display make it easy to select options that allow the equipment capabilities to be customized to application needs. Advanced microprocessor technology allows starters to identify 20 different types of fault conditions. The last four errors are retained in memory to facilitate trouble-shooting and to minimize downtime. The control reduces fluid surges and hammering in a pipe line system. This method controls the motor speed by monitoring the motor parameters with voltage control in a closed-loop system.
Derate output current by 1. If the control voltage is not removed, the unit has a cool down characteristic. The time for cool down is sec. If the control voltage is removed after tripping, you must wait at least 5 minutes before the unit can be restarted. See Section for restart limitations. Adjustable 1 to 4. Run order. Command signal may be provided by one NO dry momentary contact to terminals 1 and Stop order. Command signal may be provided by one NC dry momentary contact to terminals 2 and These two inputs are programmable.
Can be assigned to the following internal functions:. Command signal should be provided by one NC dry contact to terminals or terminals
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